The Martin Yale Master® MP50 3-hole punch is a medium duty office hole puncher that creates standard spaced holes for regular US three ring binders, spaced at 4 ¼" (center to center). With a punching capacity of as many as 40 sheets*, you can punch your pages fast and with fewer passes, making it much easier on the users as well. The durable handle is as wide as the entire machine, so you have good leverage, making it easier to punch, even at full capacity. It also has padding on it, to relieve pressure from your hands and make it more comfortable. The holes are a very slightly over-sized 9/32", which makes turning pages in binders easier and smoother. The paper guide is ruled and adjustable, so you can align your paper properly for perfectly centered holes. The MP50 punch has a non-skid bottom that grips your desk or table top to hold it steady while punching. It is manufactured with a heavy gauge steel for even more stability and durability. Want to keep it off your desk, except for when in use? That is no problem with a handle that is capable of being locked into the down position to keep it compact for storage. If you're ready to manually punch a thick stack of sheets, buy the Martin Yale Master® MP50 3-hole punch online from Binding101.